The uncertainty principle<span>, also known as </span>Heisenberg's uncertainty principle<span>, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables</span>
        
             
        
        
        
Answer:
21 minutes or 0.35 hours
Explanation:
The formula for exponential population growth is 

where 
 initial population of E.coli i.e 100
 initial population of E.coli i.e 100
k is the rate of population growth i.e 2 as the population doubles
t is the time period i.e 20 minutes
Substituting the given values in above equation, we get - 

Generation time 
 minutes
 minutes
or 0.35 hours 
 
        
             
        
        
        
C. metaphase 
this looks like an mcq from A levels
        
                    
             
        
        
        
<h2>Answer:</h2>
The correct options are 1,4 and 5. By looking at phylogenetic tree we can conclude this;
1. Species A and C may have shared features from a common ancestor.
4. Species B and E may have shared features from a common ancestor.
5. Species A is more related to species B than species B is related to species C
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Some cells have to give up reproduction